Either the ability to filter the notes in the Pinned Notes Edit view, or the ability to Pin a Note while the note is open. When you have a lot of notes, it's hard to locate those you want to pin.
Also, nice to be able to unpin a note by right clicking on it or in the note view.
I collaborate with another business also using Evernote Business, and it would be lovely to share a space with them. They can see the notebooks, but have to create their own space, so my pinning a note doesn't pin it for them.